The system was set up as a Joint Venture between Shell and Esso with Shell as the operator. Sales gas deliveries from St. Fergus gas terminal are integral to meeting the UK gas requirements on a daily basis.

The SEGAL system is made up of two wet gas transportation pipelines, the St. Fergus gas terminal, Fife NGL terminal and Braefoot Bay tanker loading facility. Wet gas is transported from the Northern North Sea along the Far north Liquids and Associated Gas System (FLAGS) line to St. Fergus and from the Central North Sea along the Fulmar Gas Line (FGL).

Access to Upstream oil and gas infrastructure

High level capacity and facilities information on Shell operated oil and gas infrastructure in the UK Continental Shelf for Prospective users.

For general enquiries regarding access to upstream infrastructure operated by Shell, please contact shell’s upstream ICOP champion, Neil Angell on +44 (0) 20 7934 3989.



The Far north Liquids and Associated Gas System (FLAGS) pipeline runs from the Brent field to the St Fergus Gas Terminal.


The Fulmar Gas Line connects a number of fields in the Central North Sea to the St. Fergus Gas Terminal.


St Fergus Gas Terminal

At the St. Fergus terminal a deep cryogenic extraction process is used to recover NGLs from the wet gas streams and deliver sales gas to the National Transmission System (NTS). 

Fife NGL Plant

The Fife NGL Plant processes NGLs from the St Fergus Gas Terminal as well as from the Total and SAGE wet gas terminals.

Braefoot Bay Marine Terminal

The Braefoot Bay Marine Terminal is a permanently manned installation designed for the ship loading of natural gas liquid products received by underground pipelines from the Fife NGL Plant.

More in this section

North Sea operated assets

Discover more about Shell’s oil and gas operated assets in the North Sea including capacity and facilities information.

Published key terms

Data published in accordance with the Code of Practice on Access to Upstream Oil and Gas Infrastructure on the UK Continental Shelf (ICOP) and the Gas Act (1995).

Contracting and procurement

Documents provided by the Contracting and Procurement Management group for information and guidance on how to do business with us.

Changes to Upstream Operational Information Reporting

Planned and unplanned unavailability of assets in accordance with REMIT.

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